Summary translation

Due to the regulation EG 2092/92 the feed used for organic broiler production has to be organic origin only. It is difficult to create feed mixtures with appropriate content of essential amino acids. In this research project the microalga Spirulina platensis (S.P.) will be tested as a feed supplement. The microalga (S.P.) contains high contents of protein (60 %) and essential amino acids (2.6 % lysine; 1.3 % methionine). A feeding trial with 360 chicken (female and male; genotype ISA J957) in total will be carried out. The animals will be fed with four different feed mixture lines up to an age of 56 days. The mixtures are different in the content of S.P. (0; 2.5; 5; 10 %). In this dose response trial animal health, fattening and slaughtering performance will be investigated.